linux-ext4 - Re: [PATCH 3/3] vfs: Add BUG_ON for delayed and unwritten extents in submit

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Date:	Thu, 07 May 2009 10:37:24 -0500
From:	Eric Sandeen <sandeen@...hat.com>
To:	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
CC:	cmm@...ibm.com, tytso@....edu, linux-ext4@...r.kernel.org
Subject: Re: [PATCH 3/3] vfs: Add BUG_ON for delayed and unwritten extents
 in submit_bh

Aneesh Kumar K.V wrote:
> We should not do submit_bh for delayed and unwritten extents. So
> add a BUG_ON on them.
> 
> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@...ux.vnet.ibm.com>

Makes sense to me, once we get our own house in order.  :)

Reviewed-by: Eric Sandeen <sandeen@...hat.com>

> ---
>  fs/buffer.c |    2 ++
>  1 files changed, 2 insertions(+), 0 deletions(-)
> 
> diff --git a/fs/buffer.c b/fs/buffer.c
> index b3e5be7..ec480c8 100644
> --- a/fs/buffer.c
> +++ b/fs/buffer.c
> @@ -2931,6 +2931,8 @@ int submit_bh(int rw, struct buffer_head * bh)
>  	BUG_ON(!buffer_locked(bh));
>  	BUG_ON(!buffer_mapped(bh));
>  	BUG_ON(!bh->b_end_io);
> +	BUG_ON(buffer_delay(bh));
> +	BUG_ON(buffer_unwritten(bh));
>  
>  	/*
>  	 * Mask in barrier bit for a write (could be either a WRITE or a

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